Method of and mechanism for producing auger bits



w. L. SCHELLENBACH AND 0. LACY. METHOD OF AND MECHANISM FOR PRODUCINGAUGER BITS.

APPLICATION FILED 1UNE5, I920.

Patented Mar. 28, 1922.

15 SHEETS-SHEET 1.

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APPLICATION FILED JUNE 5.1920.

Patented Mar. 28, 1922.

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w. L. SCHELLENBACH AND 0. LACY. METHOD OF AND MECHANISM FOR PRODUCINGAUGE R BITS.

APPLICATION FILED JUNE 5' I920.

Patented Mar. 28, 1922.

16 SHEETSSHEET 5- INVENTOM m'lh anv Z. fiofiellanfiaofi fiql y,

) ATTORNEYS.

W. L. SCHELLENBACH AND D. LACY. METHOD OF AND MECHANISM FOR PRODUCI NGAUGER BITS.

APPLICATION FILED JUNE 5, I920.

16 SHEETS-SHEET 6.

W. L SCHELLENBACH AND D. LACY- METHOD or AND MECHANISM FOR PRODUCING AUGER BITS.

APPLICATION FILED JUNE 5,1920. 1,41 1 191 Patented Mar. 28, 1922.

I6 SHEETS-SHEET 7- IN V EN TORS/ eJ/Ienacfo,

A TTORNEYS.

mn mm W, L. SCHELLENBACH, AND D. LACY. METHOD OF AND MECHANISM FORPRODUCING AUGER BITS.

APPLICATION FILED JUNE 5,1920.

Patented Mar. 28, 1922.

16 SHEETS-SHEET 8.

INVENTORS/ hefien/fiaofv, 66 Ila OZ, Y

ATTORNEYS.

W. L. SCHELLENBACH AND D, LACY. METHOD OF AND MECHANISM FOR PRODUCINGAUGER BITS.

APPLICATION HLED JUNE 5.19 20.

Patented Mar. '28, 1922.

16 SHEETSSHEET 9.

INVENTORS/ mlh'avnl. b'cheldendmfi,

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y ATTORNEYS.

W. L; SCHELLENBACH AND D. LACY. mmon or AND MECHANISM FOR PRODUCINGAUGEB ans.

, APPLICATION FILED JUNE 5,1920. 1,41 1,1 91 Patented Mar. 28, 1922.

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ATTORNEYS.

W. L. SCHELLENBACH AND D. LACY- METHOD OF AND MECHANISM FOR PRODUCINGAUGER BITS.

/ APPLICATION FILED JUNE 5.1920.

1,41 1,191, Patented Mar. 28,192;

16 SHEETS-SHEET H- ATTORNEYS.

' a z 1% ((91 QMZLYM W. L. SCHELLENBACH AND D. LACY. METHOD OF ANDMECHANISM FOR PRODUCING AUGER BITS.

APPLICATION FILED JUNE 5.1920.

Patented Mar. 28, 1'922.

16 SHEETS-SHEET 12- INVENTOM MALI/(a 77'!) 15 015 651671 baa/u,

I 06% I W gr A; TORNEYS.

W. L. SCHELLENBACH AND D. LACY.

METHOD OF AND MECHANISM FOR PRODUCING AUGEB BITS.

APPLICATION FILED IUNE5I 1920.

Patented Mar. 28, 1922.

I6 SHEETS-SHEET l3.

INVENTORS/ mfilz a/m ,Jof efle 72164072 ATTORNEYS.

W. L. SCHELLENBACH AND D. LACY.

METHOD OF AND MECHANISM FOR PRODUCING AUGER BITS.

APPLICATION FILED JUNE 5.1920.

Patented Mar. 28, 1922.

16 SHEETS-SHEET 14.

HTTO/FNEYS W. L. SCHELLENBACH AND D. LA CY. METHOD or AND MECHANISM FORPRODUCING AUGER BITS.

APPLICATION FILED JUNE 5. 1920.

1 ,4: 1 1 1 9 1 Patented Mar. 28, 1922.

I6 SHEETS-SHEET15- IN VEN TOR.

gum-( 66, W

A TTORNEYS.

W; L. SCHELL'ENBACH AND D. LACY.

METHOD OF AND MECHANISM FOR PRODUCING AUGER BITS.

APPLICATION FILED JUNE 511.920.

Patnped Mar. 28, 1922.

I6 SHEETS-SHEET 16.

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ATTORNEYS.

INVENTOR. wm W UNITED STATES PATENT OFFICE.

WILLIAM L. SCHELLENBACH, OI CINCINNATI, AND DELL LACY, OF W I LMINGTOI\'I',

orrro, ASSI'GNORS TO THE IRWIN AUGEIR, B'I'r COMPANY, or WILMINGTON,01110,

\ A CORPORATION or 01110.

mnrnon'or AND mncnmrsm FOB rnonucmo nfionn BITS.

Application filed June 5,

To all whom it may concern:

Be it known that we, WILLIAM L. SoHEL- LENBAOH and DELL LACY, citizensof the United States, residing, respectively, at Cincinnati, county ofHamilton, and State of ()hio. and YVilmington, in the county of (glinton and State of Ohio, have invented certain new and useful Improvementsin Methods of and Mechanism for Producing Auger Bits,,of which thefollowing is a specification, reference'being had therein to theaccompanying drawing.

Our invention relates to the method of and mechanism for producing augerbits. In particular it refers to the production of auger bits by theremoval from the bar of stock of the desired amount of material throughthe agency of a metal cutting wheel more particularly described andclaimed in the co pending application of'Lacy, Serial Nd 370,404, filedApr. 1, 1920.

When a relatively fast moving'hard surface which is highly polishedmoves against a somewhat softer and more or less roughened surface thefast, moving surface will tend to drag the grain of the roughenedsurface and cut it away in minute chips or slivers of metal, the actionbeing somewhat similar to that of a knife cutting a pencil. i grindingoperation on the contrary. differs from the foregoing, in that themember being ground is usually about as hard if not harderthan agrinding member when the hardness of the article as units asdistinguished from the hardness ,of the particles composing it isconsidered.

In a grinding operation the individual grains of the grinding compoundmay be much harder than the individual portions of the article beingground, but the grinding compound being of lesser strength than a groupof such hard particles, wears away more quickly than the article beingground. In grinding it becomes a question of mutual abrasion with thesurfaces Ofthe articles abrading one another being broken up in fineparticles and pulverized, thus resulting in the polishing of one of themand the gradual disintegration of the other.

It is an object of our invention to produce auger bits from a bar ofstockf Heretofore it has been the practice to form the bit through oneor more impressions upon the bar of stock to give it the properconfigurationsfor the shank, head Specification of Letters Patent.Patented Mar, 28, 1922,

1920. Serial No. 386,700.

and twist, as well as the stem. After the die work upon the bar of stockhad been completed, it had been the customin this art to dress roughlythe'formed stock, finish the stock and then polish the completed articleto give it its final finish.

This practice necessitated a number of operations. j

By means of our present invention we. are enabled to eliminate all ofthese steps if desired and in particular to elimnatethe extensive dieoperations and the rough dressing of the auger bit after it had beentreated in the bar of stock by the dies. It is within the scope of ourinvention to completethe bit down to the final polishing by ourapparatus and method of treatment, butusually we prefer to confine ouroperations tov the "removalof the, surplus metal and the rough dressingof the bit. l

Another of our objects is to provide'a ma-' chine which will veryrapidly andeconomically produce auger bits in large quantities withtheminimum amount of attention on the part of the operator and. with thenecessary accuracy- We also desire to secure a cutting medium whichwillnot have to be continually re-shaped and re-dressed or re-tem pered,which will have a very long life and will not need the manifoldattentions and safeguards incident to the use of the present dressingmediums, such as abrasive wheel.

It is an object of our invention to provide a machine which willautomatically reverse itself, which is adjustable to different lengthsof a bar of stock, which is adjustable to different pitches of the twistofthe bit, and which is adjustable to the different. conditions ofhardness of the bar of stock, as .well as adjustable to the degrees offinish desired upon the completed article. Referring to the figures ofthe drawings, they are 'as follows Fig. 1, is a side elevation of thecompleted machine takenfrom the side onwliich the operator stands;

'Fig. 2, is an end elevation of the machine looking from the right handsideto'the left hand side of Fig. 1,standing at the right hand side ofthe view in Fig. 1;

Fig. 3, is an end elevation at the left han end of the view of Fig. 1 j

Fig. 4, is a plan view looking down on top feed lever;

Fig. 6, looking" Fi 11 is a side elevation of the shank wheel the shankdrive partially in sec- 1 3 "Fig. 12 s a detailof theistart andstop me'anism; t i a P a View a Fig. 13, is edema of the start and stop inmechanism shown in plan in mechanism and a side elevation thereof;

.Fig. 14, is a perspective of the collar and shoulder composing a partof the start and 'g. 1 5. is an end view. partially in sec tip'n ofthefshifting mechanism and a portion the start and stop mechanism;

lFig lfi i is a detailedmodification of the ailstock m han sm;

17,:isa plan view of a modification of the adjusting mechanismfor theposition of'the bar of stock rotating shaft;

Fig.18 is an end elevation of the adjust- Fig. 17.; 19, is a sideelevation of the adjusta me ha sm;

ing handle onfth e tail stock;

Fig. 20,,is anend elevation of- Fig. 19,

I with the tail stock in section.

Fig is an enlarged end elevation of the upper. portion of Fig. 2 withthe side the base of themachine cut away to show the operatingmechanism'for the fine adjustment. for the crimp and shank wheels,

Fig. 22 is a plan view of the fine adjustment with the upper portion ofthe machine '1. cut away in order to reveal this portion of th m hanism;7 Fig. 23 is a side elevation'ofthe adjusting mechanism for both coarseand fine adjust- .Inents through lever 2 and hand wheel r leaking adirection opposite to that-in Figure 21.

Referring to the various figuresin which similar numerals refer to.corresponding p arts, the following is a description of the m an m; 1

is a machine tool base. I

7 Upon this base are mounted two groups of v mechanism.. ()ne group; is.stationary during operation, comprising the crimp wheel and themechanism for its rotation."

' second group. is that-carrying thehead and tail stocks holding thebitstock and also carryingthe shankwheel.

i On the base 50 1s mountedgtherefore. the

tail 'stoelg 51. ,Qarriedgin-this tail stock is the slide member 52,which in turn carries the chuck 22 and, which'is spring-pressedbyqthespring .53 outwardly. in a left hand direction. asFigurelisviewed. The chuck.

22v and the part 52 are moved to the right hand or the left hand by thelever 23. V The position of 22 and 52 with respect to 51 is fixed by theclamping lever 21. Atthe other end of 52 at theright hand side is adepending arm 26 which supports, at its lower end through an eye in thearm,'the rod 27. The rod 27 also passes through'the bracket 54 likewiseattached to the moving carriage 200 f 'vhich the support 5.1. is a part.This rod 27 has on it a setting nut 55 and a settingnut 56. Itcommunicates at its left han d'end with the lever 30 pivoted at 58 tothe carriagewith a. spring pressed plunger 59 pressed outwardly by thespring60, This plunger 59 has a beveled head which alternately engagesthe inclined surfaces of the cam 61.

Through this mechanism, as the cam 61 is fastened to the stationaryframe 50,; the movement of the carriageis reversed its direction. InFigure 1 will beseen the mo tor 29 which drives the shank wheel carriedthe carriage as it reciprocates back and forth The shank wheel is 1 2"and is used;

to remove metal from the stem 62 of the bit 63; In orderto permit'themovement back and forth of the shankwheel and its drive pulley. 64,there is placed on the shaft 65 of the motor 29 a broad pulleyor drum66,

7 so that the belt 67 shownnin dotted lines on Figure 1 ma slip backandforth on this broad surface of the drum66iwhile it is pre- 68 on eachside of the pulley 64. The pulley 6,4 is carried on the shaft 70supported in bearings 69. (See Fig. 11). v The lever 10 seen in Figure1, and more clearly in, Figure 4, is used-to adjust the position of theshank wheel 12 laterally with respect to the-moving carriage for suchminor adjust ments as may be necessary to bring the shank wheel oppositethe stem 62 as it may vary in length. Theposition isfixed on thecarriage by the setting lever 11.

After the rough-stock constituting the material out of which thepropective bit 63 is to be made is placed in the jaws of the chuck 22and 1 it is necessary to, bring the crimp and shank cutting'wheels inproper engage ment with it to form'the shank and the twist on thebit. I

Referring to Figure 2, will be seen the lever 2. 'which when lifted willserve 'to draw the crimp wheel '17 and its housing 18- towards the bit63 a'ndfat the same time draw the shank wheel 12 with its housing rentedfrom slipping off of 64 by thewalls l4 towards the shank 62. 'This dualmove 7 ment is effected simultaneously bylever 2.

The lever 2 is pivoted on the shaft .3 to- .7

which is keyed jaw 5 engaging a pin 9;.011 the support of the shankwheel12. .This

jaw 5 is pivoted at its other end at 7 toa member 6 which is in turnconnected to a member 8 running transversely of the ma-.

chine. 8 is connected at the other end at 8, to the bas 16 which carriesthe crimp wheel 17. It will be apparent as the lever 2 is lifted thewheels will be brought together and as it is depressed the wheels willbe spread apart.

The hand wheel 20 is used to elfect aminor'adjustment with the member 8with relation to the jaw 5 through the connection 6, which is pivoted'tothe jaw 5 at '7 by the movement of the screw 20* in 8. This is necessaryin order to adjust the relative position of the two cutting wheels toone another and to determine the exact time at which the crimp wheelwill come in contact with th bar of stock of the bit. The-carriage withthe tail stock 51 travels on the base 50 in the dove-tail 72 of theusual'construction in the machine tool art.

Referring to the crimp wheel," Figure 2, 17 is the wheel itself, 19 theridges or projections on it to form the proper twists on the bar ofstock of the prospective bit and 18 is th safety housing which incasesthe wheel. Likewise 14 is the housing for the shank wheel 12. The crimpwheel is carried on a shaft 73, Fig. 2, supported in the bearings 7474,(see Fig. '5) between which is located the driving pulley 75. The crimpwheel with its shaft, bearings and driving mechanism, does not movelongitudinally, but only moves laterally outside of its revolutions withits shaft. It is driven by the motor 28 seen in Figure 5. In Figure 5,the crimp wheel with the housing removed can be clearly seen in sectionat the upper left hand corner. The pump 76 for sup plying oil or anycutting compound to the bit being manufactured and its drive 77 from themotor 28 can also be clearly seen in this view. 78 is a dove-tailconstruction which guides the sliding movement of the crimp wheeltransversely of the machine.

Referring to Figures 1 and 4, 79 is a chuck shaft on the right hand endof'which is a chuck 71 with an enlarged head 80 which holds the shankends of the prospective bit. Next to the chuck end of the chuck shaft 79is a bearing 81 which supports that end of the chuck shaft 79. The chuckshaft 79 passes through the box 82 which contains the reversing gearshown in detail in Figures 6, 7 and 9. The chuck shaft 79'then passesthrough a support 36 which is internally threaded at 83. Vithin thisin-- ternally threaded support is the'screw 84 mounted on the end of thechuck shaft 79 and retained by thenut 85 at the end of the chuck shaft79. The pitch of this worm 84 or screw is that of the twist'of the bitto be produced, so that the revolution of the screw, and consequentlythe chuck shaft 79 will revolve the bar of stock of the bit at theproper speed and in proper time with'the crimp wheel, so that theconfigurations or projections on the crimp wheel will cut away the metalbetween the twists and in the hollows down to the stem of the finishedbit removing at the sainetime any'surplus metal on the periphery of thetwist and the periphery of the head.

In order to adjust the position of the shaft 79 with its worm andinternally threaded support it is mounted upon a support 36 sliding in adove-tail 203 and which is actuated by a shaft 34. 34 is threaded into aprojection of 35 in the form of a neck at 86. The shaft 34 carries abevel gear 33 at its right hand end as Figure 6 is viewed, whichmesheswith a bevel-gear at right angles thereto, known as 32, mounted onthe end of the shaft 31. At the other end of the shaft 31 is the handwheel 24 seen at the left hand of Figure 1, all of which mechanism iscarried by the moving carriage. 36 is adjusted, with its bed 35 by thewheel 24, in the groove or dove-tail 203 of th housing 82. The object ofthis adjustment is to bring the chuck shaft 79 carrying the bar of stockin proper position with relation to the crimp and shank wheels I beforethe operation commences. I

The drive for the carriage is seen in the plan view'of Figure 7. Thepulley 87 on thehousing 82 which drives the carriage backwards andforwards is mounted onthe' shaft 37 which has on its inner end a worm38. This worm meshes with a worm wheel 39 mounted on a vertical stubshaft 40. Th worm wheel, 39 has fastened to it on its under side a bevelgear 41 which meshes with a bevel gear 42 on one side and with a bevelgear 88 on the other side. gears 42 and 88 turn loosely on the chuckshaft 79 while the clutch 44, with a series of teeth on each end, ismounted on the sleeve 44? (splined to the chuck shaft 79) so that it maybe moved laterally on the shaft in either direction as a clutch. ,Thesleeve 44? is used so as to prevent any communication of movement or,pressure on the clutch 44 when sliding on the sleeve 44?; this pres surewould be present in case'the clutch 44 were directly splined on theshaft 79. Teeth on either end of 44 are adapted to engage with either 42or 88 depending upon the direction in which it is desired to turn theshaft. This clutch 44 with theteeth on either end, is actuated in eitherdirection from time to time by the reversing lever 30 which is'connectedat" 89 to 44.

Both

machine as viewed in Figure 1, the length f movement of the carriage isdetermined by the. stops 56 and, 55-. When 26 comes in Contact with 55it moves the shaft27 which is connected to; the reversing mechanismuntil the stop 56 comes in contact with the bracket 1 which isstationary, at which timethe reversing lever 30 is actuatedand and the,movement of the slide200 starts to A the right."

The bracket 5 1is fastened to 200 and en gages the stopg56, thusvtripping the feed and again reversing the movement.

of the bar of stock by the crimp wheel.

1 The object of. this adjustment is to have the carriage travel adistance necessary to.

give a complete treatment tothe entire twist it happens that the bar orstock is longer than normal, it will be seen that when'the adjustment ismade in fitting the bar of stock in the jaws of the chuck 22 it will bemoved further over to the right'which' verse the. direction of the.carriage.

' method of with the gear nected to a shaft 204 at 205. e0.

th's connection, 1t should be understood that one revolution ofthe screw84 1s equal to one space on the bit between the shoulders of the twist.

Referrin to Figures 6, 8, .10, 13,14: and 15, the foowing is adescription of the stopping and starting the movement of thecarriage asitis actuated by the chuckshaft 7 9. In Figure '6, it will be seen thatthe clutchv 4: 1 is splined to the sleeve 4: 1 which sleeve is splinedto shaft 79. 44: assumes three positions: engagement 88, neutral, andengagement with gear-42. Gears 88 on tl1e SleeVe4}P, I f The shifting ofthe clutch 1 1 with itsteeth on either enc into engagement with 42 isaccomplishedby the movement of j the re- 'versinglever 3Qwhich (seeFig. 1) is con- 7 This shaft carries onait a member 206 having a pair ofjaws207'and 208:; These jawshave heads .89 which project between thewalls, 209 of the clutch 44:. j

*InFigures 15,12 and13 willbe seen'a jacl'rshaft On shaft is mounted aand 42 turn loosely .pin'211. The shaft itself is actuated by the leverwhich" may be set by the spring pressed plunger 212, to twopositions. upor down as determined by the notches 213. By actuating 25' (see Fig. 10)an 1 thereby Totating. the jack shaft 210 we movethe pin 211. The pin211'trave1sin a fillil-Ilglllilf. slot or opening 214. This opening isin the collar 215. The movement of the pin 211 downward and in contactwith wallsof the opening 214twill movethe collar 215 to its neutralposition. Connected to 215 isa projecting shoulder 216 which projectsbetween the walls209 of the clutch 41 and as 215 is moved laterally, 216moves the clutch 14: laterally onthe chuck shaft 7 9. Therefore, it ispossible to adjust the clutch a4 only in neutral position by the handle25 and thus stop the revolution of the chuck shaft. 79. In one positionof the jack shaft210 and itspin 211 it will have no effect upon 4 1being shifted back and forth by the lever 30, but when actuated it maywithdraw 4A to neutral position, thus stopping all rotation of the chuckshaft 79.

Referring to Figure 1, again, we have described one of our embodimentsof cur. invention in that portion of the .machine which holds the headof; the bit. In Figure 16, is another construction. 150 is the centeringdevice carryingflthe tail stock 51. i

This centeringdeviceis tapered and fitsinto a cylindrical holding member151. This cylindrical holding'device is spring pressed in the left handdirection by the spring 152, which abuts against the stock 153. Themember'151 is actuated in either direction by the rack 15 1 and thepinion 155,. the. latter ,carriedlonthe shaft 156, which is ro tated bythe lever 157 ,seen in Figures 19 and 20. The limit of movement of 151is determined by the pin'158 traveling in the i 7 slot 159 which hasbeencut away in one side of 151. The precise position of 151 is locatedat any pointby the rack 160 and the 161 carried by the level: 157. Thedog is held in engagement by means; of the i spring 162 and moved out ofengagement. by the lever163. The advantage of this particularconstruction is to adjust the. centering piece with one hand.

i In Figures 1-7 and 18, is an alternative construction for theadjusting of the position of the chuck shaft 79. V The coarseadjustmentof the position of the chuck shaft .79 is effected by the'lever 164:.This lever is pivoted at 165 toanother lever 167i l67'is pivoted to 168,a't 169; 165

is supported pivotally, at 170 and is connected pivotally at 171 to theyoke 172, which is fastened to 35.- This adjusts 35 and36 carrying thechuck shaft79, lengthwise of the machine. I I V cured when the spring166 on the lever 164 is, allowed to bring the member 173 to a The fineadjustment 'is' se-

